Skip to main content

Full text of "The Morphology And Evolution Of The Apes And Man"

See other formats

TEE  XEEVOl'S  SYSTEM                  -T,
pain*, end in the neopsiliviii;, *vh:ch 'i!^: ":d^s the motor centres. The olfactory vrsntie? iixd nejiailiuft: vary considerably in their aiix:e:>:oi;s in c ire rent Mammals; and brains are divides! into two das?es-— macrosmatic and microsmatie—according :o the ?;;:*- 01 the olfactory areas. Tht Anthropoids have t^^ll olfactory areas and a large neopalliuu:; and the latter reaches enormous proportions in Man. It is due to the enormous growth of the neopalliuu: that the human brain is nearly three times :is large as that oi the Gorilla, whereas the Gorilla, is equal to. or ^i^ewhat larger than him in bodily stature.
Professor Elliot Smith has pointed out that: " The neopallium assumes important functions and becomes a condition of survival for the tirst time in the Mammalia, and in each successive epoch it has become incumbent upon every mammal either, on the one hand, to adopt some eminently safe mode of life or some special protective apparatus to avoid extinction, or, on the other hand, to 'cultivate1 a larger neopailiaxu, which, as the organ of associative memory, would enable it to acquire the cunning and skill to avoid danger and yet adequately attend to its needs."
The Anthropoids and Man exhibit different methods of action when danger threatens. The Orang leads a retired life in the trees, so he escapes many dangers; and he is very tenacious of life. The Gibbons and Chimpanzees, whose sense of hearing is very acute, take refuge in flight when danger threatens. The Gorilla and Man have no one sense highly developed; but they act differently. The Gorilla shows fight, and his brutality and immense muscular power make him a